Brent crude jumps 3% to $81.85 as equities slip

Brent crude jumped 3 percent to $81.85 a barrel Wednesday, dragging the S&P 500 down 0.2 percent and the Dow Jones Industrial Average 0.6 percent lower as traders priced in a prolonged closure of the Strait of Hormuz.

"Less money spent on gasoline could stimulate second-half spending for the back-to-school and holiday seasons," Christopher Graja, chief economist at Argus Research, said in the firm's August market digest.

The advance extends a rally that began after Iran closed the strait, through which about 20 percent of global oil supply passes. WTI crude hit a 2026 high of $110 a barrel on April 7 before retreating to the mid-$90s, Argus data show. The latest leg higher comes as peace talks between Washington and Tehran remain stalled, with the waterway still mostly shut.

For the Federal Reserve, the oil spike complicates an already delicate balancing act. The central bank held its benchmark rate at 3.50 percent to 3.75 percent in July, with three of 12 board members voting for an immediate quarter-point hike. CME FedWatch data show futures pricing a 65 percent probability of a rate increase by the September meeting.

The equity reaction shows how the oil shock is filtering through the economy. The S&P 500 finished July down 0.1 percent, while the 10-year Treasury yield climbed to 4.75 percent by the end of the month, Argus data show. June consumer prices rose 3.5 percent from a year earlier, with energy the main driver.

Oil's Rally Tests the Fed's Patience

The last time crude traded near current levels, in April, the S&P 500 fell more than 9 percent from its January peak before recovering. Argus now sees no reduction in the fed funds rate this year, a reversal from the three cuts it projected at the start of 2026.

Supply remains the dominant driver. The strait closure has forced buyers in Asia, which relies on the waterway for most of its crude, to seek alternative grades from West Africa and the Americas, stretching tanker capacity and pushing freight rates higher. U.S. producers have stepped up output, but the loss of Iranian barrels and the rerouting of Gulf supply has left the market with little spare capacity to absorb further disruptions.

Higher energy costs are also reshaping trade flows. U.S. oil exports rose after the strait closure, helping lift second-quarter exports 4.5 percent, while imports climbed 11.5 percent, Argus data show. The resulting drag on net exports subtracted 1.01 percentage points from second-quarter GDP growth, which came in at 1.5 percent annualized.

On the demand side, elevated pump prices are starting to bite. U.S. gasoline averaged more than $4 a gallon in the spring, and while it has eased since, the latest leg higher threatens to reverse that progress. Argus projects consumer spending on goods rose 5.2 percent in the second quarter but notes that spending on gasoline declined, a sign households are adjusting.

If oil holds above $80, the Fed faces a harder choice at its September meeting: hike to contain inflation or hold to support growth. If peace talks resume and the strait reopens, crude could retreat quickly, easing pressure on both prices and policy. Traders are watching for any sign of a breakthrough, with the next round of negotiations expected within weeks.

This article is for informational purposes only and does not constitute investment advice.